kV vs potential unit

kV and potential unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
kV	Yes	No	No	No
potential unit	Yes	No	No	No

As nouns, potential unit is a hypernym of kV; that is, potential unit is a word with a broader meaning than kV:

kV: a unit of potential equal to a thousand volts
potential unit: a measure of the potential energy of a unit charge at a given point in a circuit relative to a reference point (ground)

kV (noun)	potential unit (noun)
a unit of potential equal to a thousand volts	a measure of the potential energy of a unit charge at a given point in a circuit relative to a reference point (ground)